How to overload constructors in JavaScript ECMA6? [duplicate]

There is no in-built solution for this in JavaScript. An alternative solution can be using the arguments object (in some cases), or passing your own configuration options, similar to this:

const defaults = {
    numberWheels: 4,
    color: "black",   
    name: "myCar"
}

class Car {
    constructor(options) {
         this.wheelsNum = options.numberWheels || defaults.numberWheels;
         this.name = options.name || defaults.name;
         this.color = options.color || defaults.color;
    }
}

This is basically the old school solution, I use the same logic in ES3.